Exercise: Using embedded code to calculate profit margin

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The aim of this exercise is to show the profit margin for the 10 most
expensive films:

For each film, we'll calculate and show the
profit margin.

To do this, first create a new report called Ice is better than
water,
and within this create a table as shown above.

To get the top 10 films, create a dataset ordering the films in descending
film budget order, then amend the SQL string
generated so that it begins: SELECT TOP 10 ...

Now create an embedded function to calculate the profit margin
using the following formula:

Profit margin = (Box office takings - Budget) / (Budget)

Call your embedded function within an expression to display the profit
margin: